Improved wood pavement



waited 5mm stent, @Mira l ALBERT BETTELE Y, OF BOSTON, MASSACHUSETTS.

Letters Patent No. 94,066, dated August 24, 1869.

IIWIERO'V'EFD WOOD PAVEMENT.

*H The Schedule referred to in these Letters Patent and making part ofthe same.

To all whom 'it may concern.:

pavement, with reference to securing such forms of blocks as shall bemost enduring to wear andleast liable to relative movement after thepavement is laid.

My invention consists in the employment of blocks of polyhedron shape,or with flat or horizontal top and bottom surfaces and rhomboidal sidefaces,'each block in the pavement being kept from rising by the blocksupon two adjacentsides of it, land upon its other two sides resting upon`the adjacent blocks, each blockv being preferably cut off at thesalient angles of its upper face, thereby making a groove between-eachtwo adjacent blocks, giving a foothold for horses and preventingthe'block's from splintering.

The drawing represents a set of these blocks laid together to form apavement, the blocks of adjacent rows being inclined in alternatelyopposite directions.

A shows a plan of a'portion ofthe pavement;

B, an en d view of adjacent blocks; and

O, a side view ofthem.

c a denote theblocks of one row;

b b, blocks of a second row; and I cc, blocks of a third row.

Each block c has its upper base (l and its lower basee, holizontal, andeach base is of a lozengeform,as

shown at A.

From the planeof the upper face, each'side face iuclinestoward the bedofthe road, each two opposite faces being parallel.

Each block c is precisely like the block a, but in each intermediatevblock is the side faces in the direction of the length of the seriesare'inclined in a direction opposite to that of the corresponding facesof the blocks a ande, tle other faces being parallel to the adjacentandeon-esponding faces of the blocks a c.

Thus it will be seem-that though the blocks are so formed that theircontiguous faces lie together, yet these faces so lap or extend over andunder each other on all sides, that the blocks, as it were,.interlockand mutually support each other in vertical directions.

Each block, on. its two overhanging or salient upper edges, is ,cutawayor chamfered ofi', as seen in the drawings,.thereby forming, betweenthese edges of the block and the adjacent edges of adjacent blocks,

v andV bottom face, may

block made thinner, or of plank. I prefer, however, a

grooves which prevent the slipping of the feet of horses, and alsoprevent the wood from splinter-ing.

The upper face of each block presents the fibre of the wood endwise, andthe libre runs parallel to the four sides of each block, the block beingmade by cut- `ting up square joist, or timber square in section, bysexies of 'cuts,'the line of each cut inclining both to the base and tothe side of the joist, the several cuts beingr in the same directionsfor one set of blocks; other timber being similarly sawed, but with thein'- clinations of the cuts running in the opposite directions for theadjacent blocks.

Thus each block 'is a rhombic prism, the faces of I which are formedfrom the sides of the square timber, and the 4bases bythe end-grain ofthe timberout into planes angular to the side faces. l

It will be obvious that there is no waste of stock in forming theblocks; .that every block lies close to its fellows, and is vsosupported by them, and so aids' in their support; that relative movementof the blocks, by wear or by'the strain of hoofs, is impossible; thatthe grain of the Wood is presented in the best position to secureendurance;'and that as the faces *ofthe blocks of adjacent rows areparallel, the pavement can be easily constructed, the blocks being asreadily laid as if the faces were all vertical, instead of 'all angular.

In laying adjacent rows, the blocks are preferably laid so 'as to breakjoints, as seen in the drawings.` block of a depth about' Instead ofmaking each equal to its thickness, it may be'made much longer, and. thesides forming either angle of each base 0r top be vof unequal length, orthe form approximating to that shown.

The blocks may be fastened together at their corners by rings, or disksff, eachof which sits into four slots, cut into four adjacent andabutting corners.

The employment of these rings, or disksl is not herein claimed, as theyare equally well applicable to counecting other wood-pavement blocks,audtheir specilc construction or arrangement'may form the subject of claimin a future application for a patent.

I claim a pavement composed of blocks, the face of each one o f which'isrhombic, or rhomboidal, and the four sides-of which incline to the bedofthe road, each being held down at two adjacent sides by its adjoiningblocks, substantially as shown and described.

ALBERT BETTELEY.

Witnesses:

FRANCIS GoULD, S. B. Kronen.

